Superheater boiler



June 14, 1932. H. J. KERR 1,863,055

' SUPERHEATER BOILER original Filed Nov. 18, 1925 2 sheets-sheet 1' June 14, 1932. H KERR SUPBRHEATER BOILER 2 Sheets-Sheet Original Filed Nov. 18, 1925 EN t MQ WN Nn( O O O O O O O O O O O O O O O O O WV O O O im ILMNBN.

u n DJ a #wf im mw MN NN Ooovfooooo ooooo OO I. mw Umd@ A TTG/ENE Vf Patented June 14, 1932 A UNITED STATES PATENT OFFICE HOWARD J. KERR, OF WESTFIELD, NEW JERSEY, .ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION 0F NEW JERSEY SUPERHEATER BOILER Application led November 1S, 1925, Serial No. 69,744. Renewed February 18, 1931.

My present invention relates to superheater boilers, and particularly to arrangements for supporting and protecting the superheater when located between banks of wa- 5 ter tubes in steam boilers, and will be best understood from the following description and the annexed drawings, in which Fig. 1 is a side'sectional View of a portion of' a steam boiler of well-known type embodying my invention; Fig. 2 is an enlarged section on line 2 2 of Fig. 1; Fig. 3 is an enlarged view of one of the details of Fig. 1; Fig. 4 is a front view of Fig. 3, with some of the surrounding parts in place; Fig. 5 is an enlarged view of one of the superheater headers shown in Fig. 1; Fig. 6 is a partial section of Fig. 5 on line 6 6 of that figure; Fig. 7 is an enlargement of a portion of Fig. 6; Fig. S is a. partial section on line 8-6 of Fig. 1; Fig. 9 is a partial section on line 9-9 of Fig. 1, and Fig. 10 is a partial section on line 10-10 of Fig. 1.

Like reference characters indicate like parts throughout the drawings.

In the illustrative arrangement, 10 is a lower bank and 11 an upper bank of horizontally inclined water tubes of a Babcock & Wilcox boiler having the ends of the tubes of each bank connected to downtake headers 12 connected by nipples 13 and the opposite ends connected to headers 14 connected by nipples 15. The banks 10 and 11 are spaced apart to form a superheater chamber and the lower bank has no cross battle, so that the gases will rise from the furnace chamber across the: full length of these tubes in the well-known manner.

In the space between the upper and lower banks, in the illustrative arrangement, is a U-tube superheater having an inlet header 16 and an outlet header 17, the latter being at a lower level than the former and adjacent the downtake header ends of the water tubes. The headers 16 and 17 are connected by the superheater tubes 18 extending longitudinally of the boiler water tubes. The headers 16 and 17 extend at either end through the setting side walls 19 and 20 and the header 16 will have the usual pipe connectio-n 16 to the steam drum of the boiler and the header 17 the usual pipe leading the steam to the point of use or to another superheater, or the like.

As is well known, water tube boilers are usually suspended from above and, due to variations in the temperature conditions, some parts of the boiler move in relation to the points of suspension of the boiler. lVith a superheater extended from side to side of the setting, it is desirable to support the headers and the tubes to prevent their sagging. To properly suspend the superheater and, at the same time, to obviate difficulties due to the movement of the boiler in relation to the setting walls, I have provided supports for the superheater, both as to the tubes and the headers, which transmit the weight of the superheater to the boiler members only, the superheater thus being free to move with the boiler parts which support it, so that no stresses are induced on the superheater and the boiler parts, as would be the case if the superheater were partly supported in the setting and partly supported on the boiler.

In the illustrative arrangement, the header 16 is provided with one or more lugs 21 to each of which a suspension member 22 is pivotally connected, each one of these supporting members, in turn, being connected to members 23 attached to a pair of the tubes in the bank 11.

The header 17 rests on one or more supporting members 24, each of which has a broad foot portion 25 resting on a plurality of the tubes 10. Moreover, the lowermost portion of the foot portion 25 abuts against the downtake headers 12, so that the horizontal thrust of the weight of the header 17 is transmitted to the headers 12. In addition, the headers 17 are provided with a, number of lugs 26 to which are pivotally connected suspension members 26 connected to members 27 attached to a pair of the tubes 11.

The tubes 18 are supported at their outer 9 ends by one or more supporting members 28 connected to supporting devices 29 each attached to a pair of tubes in the bank 11, the supporting devices 28, in turn, being connected to a bar 30 to which is attached a pluand having recesses in its side edges to part-v rality of suspension plates 31 each positioned in a diagonal aisle formed by the tubes 18 ly surround the tubes 18, as Vbest shown in Fig. 8, these plates supporting each of the tubes 18 from the tubes 11. The lower ends of the plates 31 are connected to a cross bar ;Ihe lower legs of the tubes 18 are similarly Y supported n a series of plates 33 connected at the top to a cross bar 34 and the bottom to a cross bar 35 in a manner similar to the arrangement just described for the plates 31, the bar 35 andits attached plates 33being positioned adjacent a supporting plate 36 on'which rest refractory members 37 covered by a top plate 38,'the lowermost row of the tubes 18 resting on the latter. A tube clamp 39 prevents the Vsupport 36 from moving down the` tubes 10 and a tube clamp 39l prevents the frame made up of plates 33 and bars 34 and 35from moving down the tubes 18.

From a point to the right of the header 16 extends upwardly and at an'angle a transverse baille across the upper bank 11, this baille being made up of backing plates 40 and refractories 41 in the well-known manner, the plates 40 having recesses surrounding the tubes Vand the lower ends of these plates being bent at an angle, to which is attached an angle plate, to which, in turn, are attached plates 42 of the same general character as the plates 3l, so that the tubes 18 are also vsupported from the baliie 40 and thereby from the tubes 11.

A refractory wall 43 supported on a plate 44 on the tubeslO extends in front of the header 17 and the supports 24. VA suspended baffle extends from the header 16 to the top ofthe vertical wall 43, being made up of a plurality of baille plates 45 to which are attached refractory tile 46 in the well-known manner, the upper end of the plates 45 beingV connected to lugs formed on lthe header 16 and the lower end resting on an angle member 47 supported by the suspension members 48 each connected to a pair of the tubes of the bank 11. A plate 50 extends from the top of the wall 43 to the headers 12, so that the header 17 is entirely separated from contact with the hot-gases. If desired, plates 51 simi- `lar to plates 31 may be provided in front of the wall 43. The spaces between the foot portions 25 of the members 24 are closed by tile 25 on the tubes 10, as shown best in Fig. 10.

With the arrangement described, it will be noted that the superheater headers and their tubes and, indeed, the baiies which are provided to keep the headers, and particularly the ends of the tubes entering such headers, from being contacted by the hot gases, are supported by the boiler parts, so that as the headers'12 and 14 move, say, horizontally, the superheater will be carried with them without disturbing the relation between them. In order to permit this freedom of movement and, at the same time, to permit the ends of the headers to pass out through the setting vwalls to be connected to the necessary piplngI provide openings in the walls themselves large enough to permit the necessary freedom of movement of the headers. It ywill be obvious, however,'that the space between the headers and such openings would permit air leakage into the setting or gas leakage out of the setting, and to obviate this I provide a wall box 52 at each point where a header projects through the wall and against the outer face of this wall rests a, sealing plate 53 closely surrounding the header, the plate 53 being held against. the wall box 52 by a plate 54 attached to the wally box by the bolts 55, the plates 53 being free to move in the spaces between the plates 54 and the wall box. In order to provide a supporting mea-ns for the plates 53, I provide a sleeve 55a welded to the plate 53 and a packing 56 between this sleeve and the header. vWith the arrangement just described, it will be obvious that the header can'move in the opening through the wall and, at the same time, by reason of the plate 53 in connection with the wall box and the cover 54, the opening will be sealedagainst the passage of gases or air.'

While I have shown my arrangement as applied to a horizontal tube boiler, it will be understood that this form is illustrative only and that it may bev applied to many different types of boilers. It will also be understood that the tubes 18 may extend crosswise of the boiler so that the headers will be adjacent the side walls of the setting. It will also be understood that the means for suspending or supporting the superheater from the boiler may be widely varied.

I claim: v

1. A steam boiler and'its setting having banks of water tubes y connected to water chambers with a space between the banks, and a tubular superheater including headers extending transversely between said banks and passing through and unsupported by the setting having at least the major Vportion of its tubular heating surface within said space, said superheater being supported solely on locally adjacent parts of the boiler.

2. A steam boiler and its setting having banks of horizontally inclined water tubes connected to water chambers with a space betweenk the banks, and a tubular superheater including headers extending transversely betweensaid banks and passing through and unsupported by the setting having at least the major portion of its tubular heating surface within said space, said superheater being supported solely on locally adjacent parts of the boiler. l

3. A steam boiler and its setting having banks of horizontally inclined water tubes connected to water chambers with a space between the banks, and a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and outlet headers with tubes connecting said headers, said headers extending across said space and through the walls of the boiler setting and unsupported thereby, said superheater being supported solely on locally adjacent parts of the boiler, superheater parts adjacent to said setting being so supported that they are movable relatively to said setting.

4. A steam boiler and its setting having banks of horizontally inclined water tubes connected to water chambers with a space between the banks, a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and outlet headers with tubes connecting said headers, said headers extending across said space and through the walls of the boiler setting and unsupported thereby, and supports for the superheater between each of said banks and said superheater, superheater parts adjacent to said setting being so supported that they are movable relatively to said setting.

5. A steam boiler having banks of horizontally inclined water tubes connected to water chambers with a space between the banks, a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and Outlet headers with tubes connecting said headers, said headers extending across said space and through the walls of the boiler setting and unsupported thereby, one of said headers being at a higher level than the other, a support for the lower header resting on the lower bank of boiler tubes, and a support for the upper header connected t0 tubes of the upper bank.

6. A steam boiler and its setting having banks of horizontally inclined water tubes connected to water chambers with a space between the banks, a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and outlet headers with tubes connecting said headers, said headers extending across said space and through the walls of the boiler setting, said walls having relatively large openings through which said headers extend out of contact with the walls, and cover plates closely surrounding the headers and extending over said openings, whereby said headers may move in said openings and the openings are sealed, said superheater being supported solely on locally adjacent parts of the boiler.

7. A steam boiler having banks of horizontally inclined water tubes spaced apart, water chambers connected to the ends of said water tubes, a superheater in said space with an upper and a lower header extending through said space and across the water tubes, superheater tubes extending longitudinally of said water tubes and connecting said headers, said lower header being adjacent the water chamber connected to the lower ends of the water tubes, a support for said lower header resting on. the lower bank of water tubes and arranged to transmit its horizontal thrust to the adjacent. water chamber, and a suspension support for said upperheader connected to the tubes of the upper bank of water tubes, said superheater being supported solely on the boiler;

8. A steam yboiler and itsv setting having banks of water tubes connected to water chambers with a space between the banks, and a tubular superheater having at least the major portion of its tubular heating surface within said space, said superheater including headers extending transversely between said banks and passing through and unsupported by the setting, said superheater being supported solely from said banks.

9. A steam boiler having banks of water tubes connected at their ends to water chambers with a space between the banks, and a tubular superheater having at least the major portion of its tubular heating surface Within said space, said superheater including a lower and an upper header extending transversely of the boiler between said banks, and a baiiie located adjacent said headers and extending upwardly from the lower header to the upper header and across tubes of the upper bank, said superheater and said baiiie being supported solely from said banks of tubes.

10. In a boiler having water tubes, a boiler setting and a tubular superheater supported entirely upon said tubes, said superheater having headers extending through said setting and freely movable with respect thereto.

1l. A steam boiler and its setting having horizontally inclined water tubes, a t-ubular superheater having superheater parts adjacent said setting and supported so that they are movable relative to said setting, said superheater being supported entirely upon locally adjacent parts of said boiler.

12. In a boiler setting, a water tube boiler, a superheater having headers passing through said boiler setting, gas seals where said headers pass through, said superheater and headers being supported entirely from said water tubes.

13. In a boiler setting, a water tube boiler, a superheater located within said boiler setting and having water tubes on opposite sides thereof, said superheater having headers passing through said boiler setting, gas seals Where said headers pass through, said superheater and headers being supported entirely from. said. Water tubes =on opposite sides of said superheater. I f 4 1 14:. In a boiler having Water tubes, aboiler setting, `a tubular superheater supported entirely upon said tubes, said superheater having headers extending through said setting and freely movable With respect thereto,

anda baiile between said superheater headers also supported upon the tubes of said boiler.

y 15. In a boiler setting, a Water tube boiler, a superheater havingv headers passing through said boiler setting, gas seals Where said'headers pass through, said tubes and headers being supported entirely from said Water tubes, and a baffle between said superheater headers also supported upon the tubesof said boiler. v 4

' vHOWARD J. KEER. 

